(a) Where the parking requirements for a use are not specifically defined herein, or a use is not mentioned, the parking requirements for such use shall be based upon the requirements for the most comparable use specified herein.
(b) For the purpose of this Zoning Code, the number of employees shall be the maximum number of persons to be employed taking into consideration day, night, and seasonal variations.
(c) For the purpose of computing the number of parking spaces required, floor area shall mean the sum of the horizontal area of every floor of a specified use, excluding stairs, washrooms, elevator shafts, maintenance rooms, storage spaces, display windows, fitting rooms, and similar uses. All dimensions shall be measured between interior faces of walls for determining off-street parking requirements.
(d) When computing the required number of parking spaces, all fractional spaces shall be rounded to the next highest number.
(e) When any land or building is used for two or more purposes, the number of parking spaces required shall be eighty percent (80%) of the sum of the requirements for the various individual uses, computed separately in accordance with this Zoning Code.